Sizes 8 and above are "security style" and have a hole in the tip. These bits are for power screwdriver and drill applications. If you need security bits sized smaller than 8 we recommend you buy our ABSTFS Torx full bit set, which has security bits down to size 6. Specification: Type of head: Torx Type of shank: 6.25mm / 1/4 inch hex Size: T6, T7, TS8, TS9, TS10, TS15, TS20, TS25 Neck length: 1in Overall length: 2in 1 x 50 mm*T6 Torx 1 x 50 mm*T7 Torx 1 x 50 mm*TS8 Torx 1 x 50 mm*TS9 Torx 1 x 50 mm*TS10 Torx 1 x 50 mm*TS15 Torx 1 x 50 mm*TS20 Torx 1 x 50 mm*TS25 Torx